Engine catalytic converter

Details Engine catalytic converter Engine catalytic converter

Filed on

1996-01-18

Date issued

1998-11-24

Examiner

Hart, Douglas

Patent Class

Power plants

SubClass

Internal combustion engine with treatment or handling of...

SubSubClass

By means producing a chemical reaction of a component of the...

Other Related Categories

60299, 60300, 422171, 422174, 422180, F01N 328

Type

Patent

Status

active

Patent number

058392769

Description

ABSTRACT:
A catalytic converter has an upstream catalyst-coated core and downstream catalyst-coated core housed in a same casing, the upstream core being provided with a heater. A bypass passage for bypassing the upstream core to the downstream core is formed between the casing and upstream core. By providing these two catalyst-coated cores and the bypass passage in the casing, the catalytic converter is rendered compact. Further, as the flowrate of exhaust gas through the upstream catalyst is reduced by the bypass passage, temperature rise of the upstream catalyst due to the heater is accelerated, and the emission amount of hydrocarbons and carbon oxides during engine warm-up is decreased.

REFERENCES:
patent: 3180712 (1965-04-01), Hamblin
patent: 3503714 (1970-03-01), Lang
patent: 3813226 (1974-05-01), Heitland
patent: 5264186 (1993-11-01), Harada

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